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Preparation of Small-diameter Capillary Columns for Gas and Supercritical Fluid Chromatography by Robert C. Kong; Steven M. Fields; W.Paul Jackson; Milton L. Lee is a Chemistry article available to read on EtoBox.

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Small diameter (255100 pm I.D.) fused-silica capillary columns with non-extractable SE-33, SE-54 and 50% phenyl polysiloxane stationary phases were prepared. Elevated coating temperatures and mixed solvent coating solutions facilitated the static coating of these small-diameter columns. Azo-tert.-butane was used as the free-radical initiator for crosslinking. Stationary phase film thicknesses of up to 1 pm were successfully immobilized. Coating efficiencies were above 70% (SE-33), 50-80% (SE-54), and 2&40% (50% phenyl polysiloxane). Nearly 700,000 theoretical plates (gas chromatography) were generated by a 46 m x 50 pm I.D. column coated with a 0.25~pm film of SE-54. In general, supercritical fluid chromatography efficiencies at practical mobile phase velocities were approximately one-fifth of those produced by gas chromatography at optimum mobile phase velocities from the same columns. Experimental determinations of column performance agreed well with theoretical predictions.

Who reads Preparation of Small-diameter Capillary Columns for Gas and Supercritical Fluid Chromatography?

Author

Robert C. Kong; Steven M. Fields; W.Paul Jackson; Milton L. Lee

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1873-3778)

Published

1984

Language

EN

Field

Chemistry (Physical Sciences)